Uniwill GM7AG8P Laptop Replacement Battery 11.55V 7800mAh

Uniwill GM7AG8P — 11.55V Li-Polymer Replacement Battery

This is an 11.55V, 7800mAh (90.09Wh) lithium-polymer replacement battery for the Uniwill GM7AG8P notebook. It slots directly into the GM7AG8P chassis and restores portable power when the original cell has degraded past usable capacity. Voltage and connector pinout match the factory specification.

• GM7AG8P platform fit: The GM7AG8P uses an 11.55V three-cell Li-Polymer configuration with a multi-pin connector that carries both power and BMS data lines. This replacement matches that voltage rail and connector layout, so the notebook's charge controller recognises the pack without firmware intervention.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, monitoring BMS handshake, charge acceptance, and cutoff behaviour. The protection circuit held cutoff at the expected low-voltage threshold and accepted a full charge without thermal event or communication fault.
• First-cycle conditioning on the GM7AG8P: After fitting this battery, run the notebook on battery power down to automatic hibernate, then charge uninterrupted to 100% without using the machine. This single learn cycle lets the BIOS recalibrate its fuel gauge IC against the new cell and clears the false "poor health" warning that appears after every cell swap.

BIOS reporting poor battery health immediately after fitting the new cell

The GM7AG8P BIOS stores charge history and wear data from the previous cell in its EEPROM. When a new cell is fitted, that stored data no longer reflects reality, so the system flags the battery as degraded before a single charge cycle has run. This is a firmware state issue, not a fault with the replacement cell. One full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the battery learn cycle and overwrites the stale EEPROM data. After that cycle, the BIOS health indicator should read accurately.

Laptop shutting down abruptly at 20–30% charge shown on screen

This happens when the cell voltage drops sharply under the combined load of the CPU, display, and active storage — a voltage cliff the fuel gauge IC did not predict. The gauge was calibrated to the old cell's discharge curve, so its percentage reading diverges from actual cell voltage under load. The BMS hits its low-voltage cutoff while the OS still shows charge remaining, triggering an unplanned shutdown. Run two full discharge-to-hibernate and uninterrupted charge cycles to resynchronise the fuel gauge IC to the new cell's actual discharge curve.